---
tests/all.tests | 1 +
tests/shaders/CMakeLists.txt | 1 +
tests/shaders/glsl-derivs.c | 272 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 274 insertions(+), 0 deletions(-)
create mode 100644 tests/shaders/glsl-derivs.c
diff --git a/tests/all.tests b/tests/all.tests
index 7e83169..b4d2a18 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -107,6 +107,7 @@ shaders['glsl-fs-exp2'] = PlainExecTest([testBinDir +
'glsl-fs-exp2', '-auto'])
shaders['glsl-fs-log2'] = PlainExecTest([testBinDir + 'glsl-fs-log2', '-auto'])
shaders['glsl-vs-loop'] = PlainExecTest([testBinDir + 'glsl-vs-loop', '-auto'])
shaders['vp-bad-program'] = PlainExecTest([testBinDir + 'vp-bad-program',
'-auto'])
+shaders['glsl-derivs'] = PlainExecTest([testBinDir + 'glsl-derivs', '-auto'])
fpgeneric = Group()
def make_fpgeneric(name):
diff --git a/tests/shaders/CMakeLists.txt b/tests/shaders/CMakeLists.txt
index 1ef7692..b24a515 100644
--- a/tests/shaders/CMakeLists.txt
+++ b/tests/shaders/CMakeLists.txt
@@ -38,3 +38,4 @@ add_executable (glsl-fs-log2 glsl-fs-log2.c)
add_executable (glsl-vs-loop glsl-vs-loop.c)
add_executable (vp-bad-program vp-bad-program.c)
add_executable (vpfp-generic vpfp-generic.cpp)
+add_executable (glsl-derivs glsl-derivs.c)
diff --git a/tests/shaders/glsl-derivs.c b/tests/shaders/glsl-derivs.c
new file mode 100644
index 0000000..b601e9f
--- /dev/null
+++ b/tests/shaders/glsl-derivs.c
@@ -0,0 +1,272 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+// author: Ben Holmes
+
+/*
+ * This test uses the built-in glsl derivative functions (dFdx and dFdy)
+ * on varyings after other math has been used on them.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <GL/glew.h>
+#if defined(__APPLE__)
+#include <GLUT/glut.h>
+#else
+#include <GL/glut.h>
+#endif
+
+#include "piglit-util.h"
+
+static GLboolean Automatic = GL_FALSE;
+static GLuint tex[1];
+static GLint prog1;
+static GLint vs1;
+static GLint fs1;
+static GLint prog2;
+static GLint fs2;
+
+
+static GLfloat verts[12] = {175.0, 125.0, 0.0,
+ 175.0, 175.0, 0.0,
+ 125.0, 125.0, 0.0,
+ 125.0, 175.0, 0.0};
+
+static GLfloat texCoords[8] = {1.0, 0.0,
+ 1.0, 1.0,
+ 0.0, 0.0,
+ 0.0, 1.0};
+
+
+static const char *vertShaderText =
+ "attribute vec2 textureCoords;\n"
+ "varying vec2 texCoords;\n"
+ "void main()\n"
+ "{ \n"
+ " gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
+ " texCoords = textureCoords;\n"
+ "} \n";
+
+static const char *fragShaderText =
+ "uniform sampler2D tex2d;\n"
+ "varying vec2 texCoords;\n"
+ "void main()\n"
+ "{ \n"
+ " gl_FragColor = texture2D(tex2d, texCoords);\n"
+ "} \n";
+
+static const char *fragShaderText2 =
+ "uniform sampler2D tex2d;\n"
+ "varying vec2 texCoords;\n"
+ "void main()\n"
+ "{ \n"
+ " vec2 num = texCoords;\n"
+ " gl_FragColor = vec4(dFdx(num.x), dFdy(num.y),0.0,1.0);\n"
+ "} \n";
+
+
+
+static void
+Init()
+{
+
+ glewInit();
+
+ glMatrixMode(GL_PROJECTION);
+ glPushMatrix();
+ glLoadIdentity();
+ glOrtho(0, 400, 0, 300, -1, 1);
+
+ glMatrixMode(GL_MODELVIEW);
+ glPushMatrix();
+ glLoadIdentity();
+
+ glEnable(GL_TEXTURE_2D);
+ glClearColor(0.6, 0.6, 0.6, 1.0);
+}
+
+static void
+compileLinkProg()
+{
+ GLint stat;
+
+ vs1 = glCreateShader(GL_VERTEX_SHADER);
+ fs1 = glCreateShader(GL_FRAGMENT_SHADER);
+
+ fs2 = glCreateShader(GL_FRAGMENT_SHADER);
+
+ glShaderSource(vs1, 1, (const GLchar **) &vertShaderText, NULL);
+ glShaderSource(fs1, 1, (const GLchar **) &fragShaderText, NULL);
+ glShaderSource(fs2, 1, (const GLchar **) &fragShaderText2, NULL);
+
+ glCompileShader(vs1);
+ glGetShaderiv(vs1, GL_COMPILE_STATUS, &stat);
+ if (!stat) {
+ printf("error compiling vertex shader1!\n");
+ exit(1);
+ }
+
+ glCompileShader(fs1);
+ glGetShaderiv(fs1, GL_COMPILE_STATUS, &stat);
+ if (!stat) {
+ printf("error compiling fragment shader1!\n");
+ exit(1);
+ }
+
+ glCompileShader(fs2);
+ glGetShaderiv(fs2, GL_COMPILE_STATUS, &stat);
+ if (!stat) {
+ printf("error compiling fragment shader2!\n");
+ exit(1);
+ }
+
+
+ prog1 = glCreateProgram();
+ glAttachShader(prog1, vs1);
+ glAttachShader(prog1, fs1);
+ glBindAttribLocation(prog1, 1, "textureCoords");
+ glLinkProgram(prog1);
+ glUseProgram(prog1);
+
+ glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3*sizeof(GLfloat),
+ verts);
+ glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 2*sizeof(GLfloat),
+ texCoords);
+ glEnableVertexAttribArray(0);
+ glEnableVertexAttribArray(1);
+
+
+ prog2 = glCreateProgram();
+ glAttachShader(prog2, vs1);
+ glAttachShader(prog2, fs2);
+ glBindAttribLocation(prog2, 1, "textureCoords");
+ glLinkProgram(prog2);
+ glUseProgram(prog2);
+
+ glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3*sizeof(GLfloat),
+ verts);
+ glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 2*sizeof(GLfloat),
+ texCoords);
+ glEnableVertexAttribArray(0);
+ glEnableVertexAttribArray(1);
+}
+
+static void
+loadTex()
+{
+ int height = 2;
+ int width = 2;
+ int i, j;
+
+ GLfloat texData[width][height][4];
+ for (i=0; i < width; ++i) {
+ for (j=0; j < height; ++j) {
+ if ((i+j) & 1) {
+ texData[i][j][0] = 1;
+ texData[i][j][1] = 0;
+ texData[i][j][2] = 1;
+ texData[i][j][3] = 0;
+ }
+ else {
+ texData[i][j][0] = 0;
+ texData[i][j][1] = 1;
+ texData[i][j][2] = 0;
+ texData[i][j][3] = 1;
+ }
+ }
+ }
+
+ glGenTextures(1, tex);
+ glActiveTexture(GL_TEXTURE0);
+ glBindTexture(GL_TEXTURE_2D, tex[0]);
+ glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_FALSE);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
+ GL_RGBA, GL_FLOAT, texData);
+
+}
+
+
+static void
+display()
+{
+
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ glPushMatrix();
+
+ glUseProgram(prog1);
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+ glTranslatef(75.0, 0.0, 0.0);
+
+ glUseProgram(prog2);
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+ glPopMatrix();
+
+ GLboolean pass = GL_TRUE;
+
+ float mostlyBlack[3] = {0.019608, 0.019608, 0.0};
+ float green[3] = {0, 1, 0};
+
+ pass = pass && piglit_probe_pixel_rgb(132, 125, green);
+ pass = pass && piglit_probe_pixel_rgb(205, 125, mostlyBlack);
+
+ if(Automatic) {
+ piglit_report_result(pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE);
+ exit(pass ? 0 : 1);
+ }
+
+ glFinish();
+ glutSwapBuffers();
+
+}
+
+int main(int argc, char **argv)
+{
+ glutInit(&argc, argv);
+ if(argc==2 && !strncmp(argv[1], "-auto", 5))
+ Automatic=GL_TRUE;
+ glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
+ glutInitWindowSize(400, 300);
+ glutCreateWindow("glsl-derivs");
+ glutDisplayFunc(display);
+ glutKeyboardFunc(piglit_escape_exit_key);
+
+ Init();
+
+ compileLinkProg();
+
+ loadTex();
+
+ glutMainLoop();
+
+ return 0;
+}
+
--
1.6.3.3
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